Estuaries and Coasts

, Volume 33, Issue 2, pp 384–394

Comparative Analysis of Phytoplankton Composition and Abundance over a Two-Decade Period at the Land–Ocean Boundary of a Tropical Mangrove Ecosystem

  • Haimanti Biswas
  • Mitali Dey
  • Dipnarayan Ganguly
  • Tarun K. De
  • Sandip Ghosh
  • Tapan K. Jana


Inter-annual variations of phytoplankton abundance and community organization were observed over a two-decade period along with the ancillary parameters at the land–ocean boundary associated with the Sundarban mangrove forest (21°32′ and 22°40′ N and 88°05′ and 89° E), along the NE Coast of the Bay of Bengal. The number of definable Bacillariophyceae species exceeded Dinophyceae taxa, and the total number of bloom-forming species declined from a maximum of ten in 2000 and a minimum of two in 2007. Blooms of the diatom Coscinodiscus radiatus were common in 2000 and 2007. Tide cycles and the onset of the monsoon season played important roles in diurnal and seasonal variability of phytoplankton. Phytoplankton biovolume showed seasonality, with the highest levels during post-monsoon periods and lowest levels during the monsoon period. Phytoplankton abundance was correlated to rainfall patterns, which may be altered by long-term changes in climate.


Phytoplankton dynamics Inter-annual variation Mangrove 


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Copyright information

© Coastal and Estuarine Research Federation 2009

Authors and Affiliations

  • Haimanti Biswas
    • 1
  • Mitali Dey
    • 1
  • Dipnarayan Ganguly
    • 1
  • Tarun K. De
    • 1
  • Sandip Ghosh
    • 1
    • 2
  • Tapan K. Jana
    • 1
  1. 1.Department of Marine ScienceCalcutta UniversityKolkataIndia
  2. 2.B.P.Poddar Institute of Management and TechnologyKolkataIndia

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